All the Flowers Are Dying (Matthew Scudder Series #16)

This 16th title in the Matthew Scudder series is a continuation of the high-tension story told in Hope to Die, with the return of the ingenious psychopath whose many aliases always use the initials "A.B." The man faked his own death at the conclusion of Hope to Die; while Scudder suspected the ruse, he was satisfied that A.B. was out of New York, and thus out of his life.

But he's on his way back, and no one's safe. And, as is so often the case in Scudder's world, no one's survival can be taken for granted...